That flip is masterful. But then again, Jules is super-athletic and has a lot of experience with acrobatics from her many years of dance training, so why wouldn't it be? Anyway, with the video, she also posted this message: "Was supposed to go on hike...but ended up in a pit of foam instead. That was a serious workout!!!"

And she's totally right. Studies published in the Journal of Applied Physiology have shown that 10 minutes of trampoline jumping can equal the health benefits of running for more than 30 minutes. And sproinging around for an hour can burn anywhere from 250 to 1,000 calories, depending on your intensity.

Plus, how fun does it look? I feel springy just watching her. Not enough to do a flip, mind you. But still—springy!